Design Clark-type electrode

In this section the basic design and operation of these types of sensors are described. Examples of such sensors in common use are the Clark oxygen electrode [10] and the Severinghaus carbon dioxide electrode [11]. 

The sensor designed by this group is also of interest. Instead of the Clark type sensor they have modified a channel electrode employing a rectangular flow cell. This is shown schematically in Figure 11. 

Work with these types of electrodes enables to achieve steady-state current conditions within a short time-period. Primarily proposed for monitoring and control of blood and tissue oxygen tension [10], the electrode systems with selective membranes were manufactured and used in continuous oxygen measurement in a wide variety of aqueous solutions [11]. The sensors of this type, called Clark electrodes, are described in chapter 6 of this volume. Improvements designed for continuous monitoring in industrial bioreactors may be found in section 6 of chapter 3. The most important feature of the membranes used in these sensors is their selectivity which prevents poisoning the electrode system and deteriorating the adherent electrolyte solution. 

---